# Jewelry Maker Calc – Metal Casting Weight

> Jewelry Maker Calc – Metal Casting Weight is a paid API for AI agents from jewelry-calc.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Calculates the casting weight of metal jewelry pieces (in grams, pennyweight, and troy ounces) from a wax model weight or volume, for 15+ metals including gold alloys, silver, platinum, and more.

## Facts

- Endpoint: GET https://jewelry-calc.x402tookit.com/metal-weight?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/jewelry-maker-calc-metal-casting-weight-c17d13ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HY78y81s8zRusFUmgnvPW

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability jewelry-maker-calc-metal-casting-weight-c17d13ab
```

Example prompt: I have a wax model that weighs 4.5 grams and I'm planning to cast it in 14k yellow gold — can you tell me the expected casting weight in grams, pennyweight, and troy ounces, including a 10% waste allowance for sprues?

## When to prefer this

Use this endpoint when you need to convert a wax model weight or known piece volume into casting metal weight for jewelry production. It supports 15+ specific metal alloys with real density data and handles lost-wax casting conventions (wax density, sprue waste). Prefer this over generic unit converters when you need jewelry-specific outputs like pennyweight and proper alloy density.

## Known failure modes

- Missing required 'metal' query parameter returns an error
- None of waxGrams, volumeCm3, or volumeMm3 provided — endpoint cannot compute without at least one volume/weight input
- Invalid metal identifier (not in the allowed enum) causes a validation error
- Very large or zero volume/wax values may return implausible results without explicit error

## How this service works

Casting weight in grams, pennyweight and troy ounces from volume or wax model weight, for gold, silver, platinum and more.

## Output

Returns the piece weight in grams, pennyweight (dwt), and troy ounces, along with total weight including waste, volume in cm³, the wax-to-metal conversion factor used, metal density in g/cm³, and a summary. May include a disclaimer if operating in degraded mode.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "metal"
     ],
     "properties": {
      "metal": {
       "type": "string",
       "description": "One of: fine-gold-24k, yellow-gold-18k, yellow-gold-14k, yellow-gold-10k, white-gold-14k, rose-gold-14k, sterling-silver, fine-silver, platinum, palladium, brass, bronze, copper, titanium, stainless-steel"
      },
      "waxGrams": {
       "type": "number",
       "description": "Weight of the wax model in grams (lost-wax casting)"
      },
      "volumeCm3": {
       "type": "number",
       "description": "Piece volume in cubic centimetres (use this or waxGrams or volumeMm3)"
      },
      "volumeMm3": {
       "type": "number",
       "description": "Piece volume in cubic millimetres"
      },
      "waxDensity": {
       "type": "number",
       "description": "Wax density in g/cm3 for waxGrams (default 0.95)"
      },
      "wastePercent": {
       "type": "number",
       "description": "Extra metal for sprues and button as a percent of the piece (default 0)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "metal": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "pieceDwt": {
       "type": [
        "null",
        "number"
       ]
      },
      "volumeCm3": {
       "type": [
        "null",
        "number"
  
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/jewelry-maker-calc-metal-casting-weight-c17d13ab/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from jewelry-calc.x402tookit.com](https://www.zero.xyz/host/jewelry-calc.x402tookit.com/llms.txt)